X(3872) in a hot pion bath

Abstract

Right since its discovery in 2003 by the Belle collaboration, establishing the nature of the $X(3872)$ meson has been one of the main priorities in the field of quarkonium physics. Not qualifying as a conventional $c\bar{c}$ state, the multiquark structure of this exotic meson has received very different interpretations, ranging from a compact tetraquark configuration to an extended $D{\bar{D}}^{\ast }+c.c.$ molecule. In this work we explore the effect that a hot pion bath may have in the properties of the $X(3872)$, assuming this state to be a $D{\bar{D}}^{\ast }+c.c.$ molecule. We derive the finite temperature effects on the $X(3872)$ from a coupled channels unitarized amplitude, obtained including the properties of the charmed mesons under such conditions. We find that the $X(3872)$ develops a subtantial width, of the order of a few tens of MeV, in hot pionic environments at temperatures $100-150$ MeV, and its nominal mass moves above the $D{D}^{\ast }$ threshold. The fact that the $X(3872)$ in a hot pion gas may no longer be a narrow resonance needs to be considered in the estimation of production yields in relativistic heavy-ion collisions.

arXiv comment6 pages, 3 figures

References in corpus (26)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Heavy quarkonium: progress, puzzles, and opportunities
• Hadronic molecules
• Diquark-Antidiquarks with Hidden or Open Charm and the Nature of X(3872)
• Observation of the Narrow State $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ in $\bar{p}p$ Collisions at $\sqrt{s}=1.96 \TeV$
• The New Heavy Mesons: A Status Report
• Observation and Properties of the X(3872) Decaying to J/psi pi+ pi- in p-p(bar) Collisions at sqrt(s) = 1.96 TeV
• Study of the B- --> J/psi K- pi+ pi- Decay and Measurement of the B- --> X(3872) K- Branching Fraction
• Dynamically Generated Open and Hidden Charm Meson Systems
• Can the X(3872) be a 1^{++} four-quark state?
• Four-Quark Hadrons: an Updated Review
• Is the X(3872) Production Cross Section at Tevatron Compatible with a Hadron Molecule Interpretation?
• Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV
• Axial Resonances in the Open and Hidden Charm Sectors
• Exotic Hadrons from Heavy Ion Collisions
• Multi-quark hadrons from Heavy Ion Collisions
• Isospin breaking effects in the X(3872) resonance
• Studying Exotic Hadrons in Heavy Ion Collisions
• QCD Sum Rules for the X(3872) as a mixed molecule-charmoniun state
• On $X(3872)$ production in high energy heavy ion collisions
• Hadronic effects on the X(3872) meson abundance in heavy ion collisions
• $X(3872)$ production and absorption in a hot hadron gas
• Tetraquark Production in Double Parton Scattering
• Properties of open and hidden charm mesons in light quark matter
• Counting states and the Hadron Resonance Gas: Does X(3872) count?

Cited by in corpus (9)

• Deciphering the nature of X(3872) in heavy ion collisions
• X(3872) Transport in Heavy-Ion Collisions
• Production of exotic hadrons in $pp$ and nuclear collisions
• Thermal behaviors of light scalar resonances at low temperatures
• $X(3872)$, $X(4014)$, and their bottom partners at finite temperature
• $D{\bar{D}}^{\ast }$ scattering and ${\chi }_{c1}(3872)$ in nuclear matter
• Production of multi-charmed hadrons by recombination in heavy ion collisions
• Charmonium, $B_c$ and X(3872) Transport at the LHC
• $Z_c(3900)$ in a hadronic molecule and a triangle singularity approach at finite temperature